Github website also feels alien and weird, like Macintosh.
It's much easier to pass around git .patch files. Anyone can post anonymously (no email or account required) a .patch file on project's phpBB forum. Because it's usual phpBB, anyone can review anonymously and it's possible to post screenshots. It takes just 1-2 minutes to post a patch. Just select your commits in TortoiseGit and click "Create Patch Serial". There are graphical instructions for TortoiseGit in sticky thread on patches forum.